Improvement in pumps



` UNrTnD STATES OHALKLEY GRISOOM, LEWIS Gli-ISCOM, AND J OHN l?.GRISOOI, OF MAHANOY PLANE, PENNSYLVANIA MPROVEMENT IIN PUMPS.

Specification forming part of Letters Patent No. 95,222, dated September8, 156D.

To all whom t may con/cern;

Be it known that we, GHALKLEY Gniscoir, Lnwis Gnrscoir, and JOHN P.Gnrscoir, of Mahancy Plane, in the county of Schuylkill and Sta-te ofPennsylvania, have invented a new and Improved Pump; and we do herebydeclare that the following is a full, clear, and exact descriptionthereof, which will enable others skilled in the art to make and use thesame, reference being had to the accompanying drawings, forming part ofthis specification;

Figure l represents a vertical longitudinal section of our improvedpump` Fig. 2 is a plan or top View ofthe same. Fig. 3 is a verticaltransverse section of the same, taken on the plane of the line a; x,Fig. 2. detail vertical transverse section of the same, taken on theplane of the line g/ y, Fig. 2.

Similar letters of reference indicate corresponding parts.

This invention relates to a new pump to be used for mining and otherpurposes; and its object isv to throw a continuous stream and-to keepthe water at an uninterrupted flow, so that when the column of water isonce started it will continue to move so long as the pump is in motion.object, besides a novel construction of pump, we connect the supply anddischarge pipe with two double-acting reciprocating pumps, the cranks ofwhich stand at right angles to eac-h other, so that when the piston ofone pump arrives at the end of the stroke the other piston will be atfull work and will keep the column of water in motion.

IVe are aware that two single-acting pumps have already been usedjointly for throwing a steady stream, but they can never be made tothrow a continuous stream, and there will be the jar and loss of powercaused by the frequent starting of the column. One double` acting pumpwill also labor under the same difculty, and only where two doubleacting pumps are used will a steady continuous stream be produced. Thefriction saved by the employ ment of two pistons for working four setsof valves will alone amount to a considerable saving. l Our inventionconsists also in a novel arrangement of the clock-chamber and in a newmode of connecting the piston-rod of the oper riguar To more eifectuallyobtain this ating-cylinc'lcr with the pump rod or rods, all being soarranged as to produce the aforesaid steady stream with the least amountof power.

A Bin the drawings are two steam-cylinders, arranged in a horigiontal orother position parallel to eachother or otherwise, as may be desired.

C I) are two pump-cylinders, arranged, respectively, oppcsiteto and inline with the cylinders A B. Upon each pump-cylinder is set aclack-ohamber, E, and the clank-chambers of the two pumps are connectedwith each other by the branched suction-pipe F, and by the brancheddischargepipe G, as is clearly shown in Fig. 3.

v H H are the piston-rods ofthe cylinders A B. I I are the pistonrods ofthe pump-plungers .l J, that are to be moved back and forth in thecylinders G D. Each piston-.rod His connected with its oppositeplungersrod I by means of an upright yoke, K, into opposite sides ofwhich-both rods H and I are screwed or otherwise rigidly fastened. Theseyokcs havelips a @projecting from their outer sides, said lips fittingover or around the upper and lower edges of stationary guideplates L,that are arranged on thebed of the machine, asindicated i in Fig. 4. Theinner faces of the yokes are grooved up and down, as in Figs. l and 2.Into these grooves it the wrist-pins Z1 of cranks c, formed on theopposite ends of a horizontal shaft, M, on which thc iiy-wheel Nismounted. As the piston-rods are drawn back and forth, they impart directmotion to the pump-plungers, and by means of the grooves in the yoke,and by the wrist-pins they also impart rotary motion to the iiy-wheelshaft M. By means of this arrangement of the yokes l, the piston andpump rodsmay be as short or as long as may be desired, no extensionconnecting-rod being employed. For mining purposes this is veryconvenient, as the machine can be set up on a very contracted bed.Moreover, by the connection of the shaft, one engine, whenthe other isnot to be used, can be employed to operatc both pumps, or bothenginesmay work one pump. In either case no other coupling will beemployed. The cranks on the shaft M stand at right angles to each other.Thereby an effectual device for overcoming the dead-point is produced,as one engine is at the middle of its stroke whenever the other isat-the end, and the column of water in motion. In this manthus oneengine always serves to overcome the dead-point of the other engine.Another advantage of having the cranks arranged at right angles is tokeep the column of water in' constant motion, as when one pump-plungeris at the end of its stroke the other plunger will be at the middle ofits stroke and the column of water will consequently be in constantmotion, provided each pump is double-acting.

To prevent friction on the wrist-pins b,there are frictionu'ollers d d,arranged around them, as shown in Figs. l and 4. Each of the clack.-chambers E is, by means of two diagonal partitions, e e, divided intofour compartments, f, g, h, andi, as shown in Fig. I. The twocompartments f and h are respectively connected by means of channels j7' with the ends of the pump-cylinder. rIhe compartments g and t', whichare between f and h, as shown, communicate, respectively with thesuction and discharge pipes. TheV partitions e, between the fourcompartments f g h t', are provided witli four valves, f', g', h', and.i, as shown in Fig. l, all of these valves opening upward.

The action of each pump will now be easily understood. If the plunger Jmoves in the direction of thearrow shown in Fig. l, it draws the valve gopen by suction and draws the liquid from the suction-pipe into thechamber g,theneeinto 7i, and finally into the pump-cylinder. The samesuction serves to keep the Valve 7i on its seat. At the same time theplunger will force the water in front of itinto the chamber f, the waterthus forced opening the valve t" and escaping into the discharge-pipe,the valvef being closed. Vhen the motion of the plunger is reversed, thewater drawn in by the previous stroke will be forced out through thevalve 7L,while the suction will operate by opening the valve j". Adoubleacting pump -is thus produced, which keeps a constant stream inmotion, except when the plunger arrives at either end of its cylinder.At that time, however, the plunger of the other pump is, owing to theposition of the cranks on the Shaft M, at the middle of its stroke, andkeeps ner a column of water is kept constantly moving, as when one pumpsstops the other will bewerking, and vice versa.` All the shocks and jarsconsequent upon the interruption of the column of water are thusavoided7 and so much friction is saved that the pumps can be worked muchquicker than one single doubleacting pump, or two connectedsingle-acting pumps could ever -be operated. By having the valvesarranged diagonally,the corners in the clack-chamber are avoided and thewater may move straight forward through the claekchamber, as indicatedby arrows in Fig. 1.

We claim as new and desire to secure by Letters Patent l. The yoke K,-to which the steanrpiston rod and the pump-plunger rod I are secured,when provided with the lips a, fitting around the upper and lower edgesof the stationary guide L, and adapted to receive the crank vpins 4ofthe ily-wheel shaft M, all arranged as described, for the purposespecified.

2. The arrangement and combination with each other of the iy; wheelshaft M, crankpins I), grooved sliding yokes K, stationary guides L,piston-rods H H, and plunger-rods I I, all arranged and operatingsubstantially as herein shown and described, for the purpose specied.

3. A mining-pump consisting of two steamcylinders, A B, of twopump-cylinders, C D, which have clack-chambers E with X-shapedpartitions, both clack-chambers communicating with the suction anddischarge pipes, as set forth, the piston and plunger rods beingconnected by means of slidinggrooved yokes K, which drive the fly-wheel'shaft M-, the cranks C' of which stand at right angles to cach other,substantially as described, for the purpose specified.

Vitnesses:

JAC/on SHELLEY, T. H. BEoHrnL.

